How to get amplitude or text information in the graph

[tgif]

Dear,

I plotted a multi xy graph (bar graph), read the data from text file.

What I'd like to do is, when user point the bar, any point in the bar with mouse, would like to put out the amplitude of the pointed bar and show some text data.

I'm using LabVIEW 8.2 and I really appreciate for your help.

Thanks,

[Evan]

Take a look at how I used an annotation to do what you wanted.  I am sure there are some tweaks and changes to be made but that whould get you started.